Question

Three angles of a quadrilateral are equal and the measure of the fourth angle is 120 digree . Find the measure of each of the equal angles.

Answer 1

Answer:

Step-by-step explanation

let the three angles be x

sum of ll angles of a quadrilateral is 360:

therefore, x + x + x + 120 = 360

3x + 120 = 360

3x = 360 - 120

3x = 240

x = 240/3

therefore x = 80

therefore all the angles are 80, 80,80 and 120

Answer 2

We know that the sum of angles of a quadrilateral is 360°

Let the equal angles be x

then,

x+x+x+120° = 360°

3x+120° = 360°

3x = 360°- 120°

3x = 240°

x = 240°/3

x = 80°

Therefore,

Angle 1 = 120° (Given)

Angle 2 = 80°

Angle 3 = 80°

Angle 4 = 80°